Drilling clamp



Sept. 21, 1937. c. o. BLEDSOE DRILLING CLAMP Filed Nov. 11, 195e 2 Sheets-Sheet l 2 F I. Inlllffnnl MNH JIIIIIJMINM 4 m 00 M I. .IH /IH 3 2 6 ivf ff, ufnlTllU IIIIH fm r fm/ am ,M 1 ha L ,1, I

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Sept. 21, 1937i. C, Q B'LEDSOE 2,093,826

DR ILLING CLAMP Filed Nov. l1, 1956 2 Sheets-Sheet 2 Inventor C' O .Bledsoe Patented Sept. 21, 1937 UNITED STATES PATENT Vo1=1=1mg1 DRILLING CLAlWP Clyde 0. Bledsoe,l Colorado, Tex.

Application November 11, 1936, Serial No. 110,400

4 Claims.

The present invention relates to new and useful improvements in drilling clamps for use particularly in oil fields and has for one of its important objects to provide, in a manner as hereinafter set forth, a device of this character em,- bodying novel means for permitting a wire line to pass therethrough without drawing, kinking, etc.

Another very important object of the invention is to provide a drilling clamp of the aforementioned character embodying a pair of hingedly connected, complemental jaws, together with novel means for suspending said jaws.

Other objects of the invention are to provide a drilling clamp of the character described which will be comparatively simple in construction, strong, durable, highly ei-licient and reliable in use, compact, light in weight, and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings, wherein like characters of reference designate corresponding parts throughout the several views, and wherein:-

Figure 1 is a view in front elevation of the invention.

Fig. 2 is a side view of the device.

Fig. 3 is a top plan view.

Fig. 4 is a detail view in perspective of the clevis for securing the jaws in closed position.

Fig. 5 is a perspective view of the jaws, showing same separated.

Fig. 6 is a detail view in front elevation of one of the slips over which the endless chains on the jaws travel.

Fig. 7 is a detail view in vertical section, taken substantially on the line 1 1 of Fig. 6.

Fig. 8 is a view in elevation of a portion of one of the endless chains.

Fig. 9 is a detail view in elevation of one of the endless chain blocks, looking at the line engaging face thereof.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a pair of complemental jaws I of suitable metal which are hingedly connected at one end through the medium of a pin 2 which is mounted in apertured ears or the like 3. Projecting from the free ends of the jaws I .are integral lugs 4 on one of which a clevis 5 is pivotally mounted. Threadedly mounted in the bight portion of the clevis 5 is a hand screw 6 which is engageable with the other lug 4 for drawing the jaws together. The .-1;

stantially the shape shown to advantage in Fig. 2

of the drawings.

The jaws I have formed in their inner faces substantially dove-tailed vertical grooves 9 for the reception of correspondingly shaped slips I0. It will be noted that the grooves 9 are closed at their lower ends. Formed in the slips I0 and extending from end to end thereof are substantially dove-tailed channels I I for slidably receiving the dove-tailed portions I4 of the blocks I2 of a pair of coacting endless chains which are designated generally by the reference numeral I5. 'I'he chains I5 are adapted to travel or revolve around the jaws I. with arcuate faces I6 having spiral grooves I1 therein for the reception of the line (not shown). Means including links I8 connect the blocks I2.

It is thought that the manner of using the clamp will be readily apparent from a consideration of the foregoing, particularly to those skilled in the art to which the invention pertains. The jaws I are, of course, suspended above the hole or Well through the medium of the bails or handles 8. With the jaws I in closed position, the blocks I2 of the endless chains I5 engage the line. Through the medium of the arcuate faces I6 and the spiral grooves I1, the blocks I2 mesh with the line in a manner to prevent said line from slipping relative to the endless chains. Now, by tightening the hand screw 6 the endless chains I5 a're pressed against the line and any desired tension may be secured for controlling the movement of said chains and consequently said line. In other words the blocks I2 of the endless revolving chains I5 retain the lay or t the construction of the line. By reason of this construction the clamp, when in use, does not break or crush the line or cause said line to kink. When sufficient tension is applied through the medium of the hand screw 6 to secure the chains I5 against revolving around the jaws I, travel of the line through the clamp is positively prevented. Of course, to open the clamp it is only necessary to loosen the hand screw 6 and swing the clevis 5 outwardly.

It is believed that the many advantages of a drilling clamp constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of con- The blocks I2 are provided struction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed ist-- 1. A drilling clamp of the class described comprising a pair of complemental jaws hingedly connected at one end, said jaws having substantially dove-tailed grooves in the opposed faces thereof, slips mounted in said grooves, said slips embodying a dove-tailed channel, endless line engaging chains rotatable around the jaws,`said chains being formed of links having bases provided with beveled edges for slidably ttingirr the channels of and travelling over the slips, and

means for releasably securing the jaws in closed position.

prising a pair of complemental jaws hingedly connected at one end, said jaws having substan: y

` adapted to revolve around the jaws, said chains tially dove-tailed grooves in the opposed faces thereof, slips mounted; in said grooves, said slips embodying a dove-tailed channel, endless line engaging chains rotatable around the jaws, said chains being formed of links having bases provided with beveled edges for slidably tting in the channels of andA travelling over the slips, and means for releasably securing the jaws, in closed position, said means including integral lugs projecting from the free ends of the jaws, a U-shaped clevis pivotally mounted at its open end on one of said lugs and adapted for engagement over the other of said lugs, and a hand screw threadedly mounted in the bight portion of said clevis and engageable with said other of the lugs for drawing the jaws together.

3. A handle attachment for the jaws of a drilling clamp comprising undercut channels in the upper portions of the jaws, and on their outer sides, and substantially loop shaped handles engaged in the channels and extending above the l jaws for suspending said jaws on a support.

' 4. A clamp of the class described comprising a pair of pivotally connected jaws for the reception of a drill line therebetween, said jaws having dove-tailed grooves in their opposed faces, dovetailed slips mounted in the grooves and having doveftailedV channels therein, endless chains including pivotally connected blocks including dove-tailed portions adapted to travel through the dove-tailed channels of the slips, said blocks having spirally grooved arcuate faces for the recaption of the line, and means for adjustably securing the jaws in closed position for pressing the endless chains against the line.

CLYDE O. BLEDSOE. 

